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Finding the Fourth Proportional to 22,807.75, 31,474.70 and 12,871.75

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Solution

The fourth proportional to 22,807.75, 31,474.70 and 12,871.75 is: 17,763.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,807.75 : 31,474.70 = 12,871.75 : x
  2. Step 2: Convert to fraction form
    22,807.75/31,474.70 = 12,871.75/x
  3. Step 3: Cross multiply
    22,807.75x = 31,474.70 × 12,871.75
  4. Step 4: Simplify right side
    22,807.75x = 405,134,469.73
  5. Step 5: Solve for x
    x = 405,134,469.73/22,807.75
  6. Step 6: Final answer
    x = 17,763.02

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.